Hezekiah was told by Isaiah, to set matters in order as he was going to die. That way, the Lord, through his mouthpiece Prophet Isaiah, was kind to King Hezekiah. Now, King Hezekiah became sick and was at the point of death. Hezekiah had 2 options: a) to receive the word released by the prophet & start acting on it or b) to make a choice to request for a change.
Ideally, King Hezekiah should have taken the instruction & gone ahead by organizing his Kingdom’s administrative matters, assigning responsibilities, equipping his deputies and sharing his vision for the nation with the next in line as well as the ministers. He would also have had many personal matters to settle – assigning people in his family various responsibilities and blessing his relations & friends – as he was preparing for the trip to his heavenly abode.